Sealing assembly

ABSTRACT

A sealing assembly includes a door and a seal. The door includes a flexible body that is movable between an open position and a closed position. The seal is movable between an engaged position in which the seal is positioned in engagement with a portion of the flexible body when the flexible body is in the closed position and a disengaged position in which the seal moves away from the portion of the flexible body as the flexible body moves from the closed position to the open position such that the flexible body is spaced from the seal to minimize frictional engagement with the seal.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims the benefit of U.S. Provisional Application No.62/131,685, filed on Mar. 11, 2015, which is hereby incorporated byreference in its entirety.

TECHNICAL FIELD

The present disclosure relates to a sealing assembly.

BACKGROUND

Active material actuators utilize an active material that transformswhen activated to provide an actuation motion. Shape memory alloys are atype of active material that transforms when activated, such as by jouleheating when an electric current is applied. In general, shape memoryalloy actuators have advantages over conventional actuators such aselectric motors in that they can be less expensive, more compact, andlighter weight with silent operation and fewer components.

SUMMARY

The present disclosure provides a sealing assembly including a door anda seal. The door includes a flexible body that is movable between anopen position and a closed position. The seal is movable between anengaged position in which the seal is positioned in engagement with aportion of the flexible body when the flexible body is in the closedposition and a disengaged position in which the seal moves away from theportion of the flexible body as the flexible body moves from the closedposition to the open position such that the flexible body is spaced fromthe seal to minimize frictional engagement with the seal.

The present disclosure also provides another sealing assembly includinga support structure defining an opening, and a door. The door includes aflexible body that is movable between an open position and a closedposition. The door covers the opening when in the closed position and atleast partially uncovers the opening when in the open position. Thesealing assembly further includes a seal. The seal includes a first bodyfixed to the support structure and a second body spaced from the firstbody. At least the second body is movable between an engaged position inwhich the second body is positioned in engagement with a portion of theflexible body when the flexible body is in the closed position and adisengaged position in which the second body moves away from the portionof the flexible body as the flexible body moves from the closed positionto the open position such that the flexible body is spaced from the sealto minimize frictional engagement with the seal.

The detailed description and the drawings or Figures are supportive anddescriptive of the disclosure, but the claim scope of the disclosure isdefined solely by the claims. While some of the best modes and otherembodiments for carrying out the claims have been described in detail,various alternative designs and embodiments exist for practicing thedisclosure defined in the appended claims.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic perspective view of a sealing assembly.

FIG. 2 is a schematic perspective view of a support structure.

FIG. 3 is a schematic cross-sectional view of a seal in an engagedposition, with the seal engaging a door.

FIG. 4 is a schematic cross-sectional view of the seal of FIG. 3 in adisengaged position.

FIG. 5 is a schematic cross-sectional view of another seal in adisengaged position.

FIG. 6 is a schematic cross-sectional view of the seal of FIG. 5 in anengaged position, with the seal engaging the door.

FIG. 7 is a schematic cross-sectional view of a bulb and a phantom viewof the bulb to illustrate the differences between engaged and disengagedpositions.

FIG. 8 is a schematic cross-sectional view of another bulb and a phantomview of the bulb to illustrate the differences between engaged anddisengaged positions.

FIG. 9 is a schematic cross-sectional view of a configuration of asecond body and a phantom view of the second body to illustrate thedifferences between engaged and disengaged positions.

FIG. 10 is a schematic cross-sectional view of yet another bulb and aphantom view of the bulb to illustrate the differences between engagedand disengaged positions.

FIG. 11 is a schematic cross-sectional view of the seal of FIG. 3.

FIG. 12 is a schematic perspective cross-sectional view of the seal ofFIG. 11 with an insert removed.

FIG. 13 is a schematic side view of a leg of the seal which illustrateshinges from a direction perpendicular to the orientation in FIG. 11.

FIG. 14 is a schematic cross-sectional view of a seal illustratinganother configuration of the legs.

FIG. 15 is a schematic side view of another seal with an arrowindicating the directions of movement of the seal relative to the door.

FIG. 16 is a fragmentary cross-sectional view of yet another seal.

FIG. 17 is a fragmentary partial cross-sectional view of yet anotherseal.

FIG. 18 is a schematic illustration of an actuator including a cablecoupled to a pair of seals.

FIG. 19 is a schematic illustration of another actuator including acable coupled to one seal.

FIG. 20 is a schematic illustration of a shape memory alloy (SMA)actuator.

FIG. 21 is a schematic illustration of another SMA actuator.

FIG. 22 is a schematic illustration of yet another SMA actuator.

FIG. 23 is a schematic illustration of an actuator including a cablethat is attached to an insert of a seal.

FIG. 24 is a schematic illustration of a latch engaging an extension ofthe door in a locked position, with the seal in the engaged position andthe door in a closed position.

FIG. 25 is a schematic illustration of the latch of FIG. 24 movingtoward an unlocked position, with the seal in the disengaged positionand the door moving toward the open position.

FIG. 26 is a schematic illustration of the latch of FIGS. 24 and 25 inthe unlocked position and the door back to the closed position.

FIG. 27 is a schematic illustration of another latch movable between thelocked and unlocked positions without utilizing an SMA actuator.

FIG. 28 is a schematic top view of an insert.

FIG. 29 is a schematic perspective view of the insert of FIG. 28 with afirst wing bent relative to a top.

FIG. 30 is a schematic perspective view of the insert of FIG. 29 with asecond wing bent relative to the top.

DETAILED DESCRIPTION

Those having ordinary skill in the art will recognize that alldirectional references (e.g., above, below, upward, up, downward, down,top, bottom, left, right, vertical, horizontal, etc.) are useddescriptively for the figures to aid the reader's understanding, and donot represent limitations (for example, to the position, orientation, oruse, etc.) on the scope of the disclosure, as defined by the appendedclaims. Furthermore, the term “substantially” can refer to a slightimprecision or slight variance of a condition, quantity, value, ordimension, etc., some of which that are within manufacturing variance ortolerance ranges. Additionally, the phrase “at least one of” as usedherein should be construed to include the non-exclusive logical “or”,i.e., A and/or B and so on depending on the number of components.

Referring to the Figures, wherein like numerals indicate like orcorresponding parts throughout the several views, the features of asealing assembly is generally shown throughout the Figures.

The sealing assembly includes a door 10 (see FIG. 1) movable between anopen position and a closed position. The door 10 can be moved betweenthe open and closed position manually or automatically. One non-limitingexample is that the door 10 can be automatically moved by utilizing amotor.

More specifically, the door 10 includes a flexible body 12 that ismovable between the open and closed positions. The door 10 can roll upinto a housing 14 when in the open position. Therefore, the door 10 canbe a fabric door, a multi-panel door, a membrane panel door or any othertype of door 10 that allows the door 10 to roll up. The flexible body 12is formed of any suitable materials and/or any suitable configuration,and can include the types of doors 10 discussed above, i.e., fabric,multi-panel, membrane panel, etc. Generally, the flexible body 12 isconfigured to allow the door 10 to roll up into the housing 14.Alternatively, the door 10 can be a swinging door. The door 10 can befor a refrigerated unit or room, a freezer unit or room, or any othersuitable door 10. The sealing assembly can improve sealing of the door10 and also minimize frictional engagement between various components asthe door 10 is moving, which will be discussed further below.Furthermore, the sealing assembly can be utilized in applications otherthan doors 10, for example, windows, etc.

Also referring to FIG. 2, the sealing assembly can also include asupport structure 16 defining an opening 18. Generally, the door 10 ismovably attached to the support structure 16. The door 10 is removedfrom FIG. 2 to illustrate the opening 18. The door 10 covers the opening18 when in the closed position and at least partially uncovers theopening 18 when in the open position. The support structure 16 can beany suitable configuration. For example, the support structure 16 can bea stationary structure such as a room in a building or can be part of avehicle to transport, for example, refrigerated/frozen food, etc. Asanother example, the support structure 16 can be a stand-alone unit thatcan be moved to a desired location, such as into a room of a building orinto a box truck for transportation, etc.

Generally, the support structure 16 can include a floor 20 and one ormore walls 22. Referring to FIG. 2, the opening 18 is defined by thewall 22, or walls 22, such that the wall 22 surrounds the opening 18 bya top edge 24, a first side edge 26 and a second side edge 28 opposingthe first side edge 26. Generally, the top edge 24 is disposed betweenthe first and second side edges 26, 28 and the top edge 24 is spacedfrom the floor 20. Beyond the opening 18, the support structure 16 canopen into another area 30 for storing/transporting items. In certainembodiments, the housing 14 is supported by the support structure 16adjacent to the top edge 24, and in this configuration, the door 10moves from the closed position to the open position by retracting awayfrom the floor 20 and toward the top edge 24. Hence, the door 10 asillustrated in FIG. 1 moves up and down relative to the floor 20. Assuch, the door 10 slides relative to the walls 22.

The sealing assembly also includes a seal 32 (various features of theseal 32 are best shown in FIGS. 3-17) that can abut or engage at least aportion of the door 10 when the door 10 is in the closed position. Theseal 32 is configured to be selectively spaced from the door 10 when thedoor 10 is in the open position for ease of opening 18 the door 10. Theseal 32 is spaced from the door 10 when the door 10 is in the openposition. When the door 10 is moving to the open position or the closedposition, the seal 32 is designed to minimize engagement with the door10 to minimize friction therebetween. Minimizing friction between thedoor 10 and the seal 32 can reduce wear on the door 10, reduce wear onthe seal 32 and increase the speed of opening/closing the door 10. Theseal 32 is fixed to the support structure 16, which is discussed furtherbelow, and therefore, the door 10 slides relative to the seal 32; assuch, spacing the seal 32 away from the door 10, as the door 10 movesfrom, for example, the closed position to the open position, increasesthe life of the seal 32 due to the minimal frictional engagement.Generally, the seal 32 can be formed of rubber material(s), softplastic(s), or any other suitable material which provides elasticityand/or movement.

Separate seals 32 can be utilized along the top edge 24, the first sideedge 26 and/or the second side edge 28. Therefore, any of theconfigurations of the seal 32 described herein can be utilizedalong/adjacent to any or all of edges 24, 26, 28 of the supportstructure 16.

The seal 32 can abut one or more edges 34 of the door 10 when the door10 is in the closed position. The edges 34 of the door can face theopening 18 of the support structure 16, and in this configuration, partof the seal 32 is fixed to one or more of the top edge 24, the firstside edge 26 and the second side edge 28 of the support structure 16,i.e., the seal 32 faces into the opening 18 and faces the respectiveedges 24, 26, 28 of the door 10. Alternatively, or in addition to, theseal 32 can abut one or more sides 36, 38 of the door 10 when the door10 is in the closed position. If FIG. 1 is illustrating a first side 36of the door 10, a second side 38 (shown in FIG. 3) of the door 10, whichopposes the first side 36, can overlap a portion of the supportstructure 16 such that the door 10, in the instance of FIG. 1, is infront of the opening 18 of the support structure 16. In thisconfiguration, the side edges 34 of the door overlap with the supportstructure 16. When the second side 38 overlaps, the seal 32 can be fixedto the support structure 16 to face the part of the second side 38 ofthe door 10 that overlaps the support structure 16, i.e., the seal 32can be fixed to the support structure 16 adjacent to, and in front ofthe opening 18. It is to be appreciated that the door 10 and the seal 32can be repositioned to behind the opening 18, and the same principlediscussed above applies. Furthermore, for the type of door 10 that rollsup into the housing 14, the seal 32 along the top edge 24 abuts one ofthe first and second sides 36, 38 of the door 10.

The seal 32 is movable between an engaged position (see FIG. 3) in whichthe seal 32 is positioned in engagement with a portion of the flexiblebody 12 when the flexible body 12 is in the closed position and adisengaged position (see FIG. 4) in which the seal 32 moves away fromthe portion of the flexible body 12 as the flexible body 12 moves fromthe closed position to the open position such that the flexible body 12is spaced from the seal 32 to minimize frictional engagement with theseal 32. Therefore, the seal 32 can be a bistable seal 32, whichtransitions between two states. For example, the seal 32 can be in theengaged position that engages one or more of the edges 24, 26, 28 of thedoor 10 and the disengaged position that disengages from the door 10such that the door 10 can easily be raised or lowered. The transition ofthe seal 32 between the engaged and disengaged positions can beinitiated actively or passively. As the seal 32 moves to the disengagedposition, the seal 32 can pull away from the door 10. Said differently,the seal 32 can lean away from the door 10 as the seal 32 moves to thedisengaged position. Therefore, a shear force can be applied to the seal32 which causes the seal 32 to pull away from the door 10. Furthermore,the seal 32 can move away from the door 10 due to stretching of the seal32 as the seal 32 moves to the second position. As such, in certainembodiments, the seal 32 can selectively deform. The seal 32 can havemany different configurations as best illustrated in FIGS. 5-17, thedetails of which are discussed further below.

Referring generally to FIGS. 3-6, the seal 32 can include a first body40 fixed to the support structure 16 and a second body 42 spaced fromthe first body 40. At least the second body 42 is movable between theengaged position in which the second body 42 is positioned in engagementwith the portion of the flexible body 12 when the flexible body 12 is inthe closed position and the disengaged position in which the second body42 moves away from the portion of the flexible body 12 as the flexiblebody 12 moves from the closed position to the open position such thatthe flexible body 12 is spaced from the seal 32 to minimize frictionalengagement with the seal 32. Simply stated, the second body 42 engagesthe portion of the flexible body 12 when in the engaged position and isspaced from the portion of the flexible body 12 when in the disengagedposition. Due to the first body 40 being fixed to the support structure16, the entire seal 32 cannot separate from the support structure 16, assuch, the seal 32 leans when in the disengaged position.

Various suitable materials of the seal 32 have been discussed above, andit is to be appreciated that the materials discussed above also apply tothe first and second bodies 40, 42, i.e., can be formed of rubbermaterial(s), soft plastic(s), or any other suitable material whichprovides elasticity and/or movement.

Referring to FIGS. 3, 4, 7, 8 and 10, the second body 42 can optionallyinclude a bulb 44 that engages the portion of the flexible body 12 whenin the engaged position. The bulb 44 can be any suitable configuration,some of which are illustrated and/or described herein. In certainembodiments, the bulb 44 can be eliminated and one or more lip(s), oneor more flange(s), etc., can be utilized as part of the second body 42.

Referring to FIGS. 3, 4, 11 and 12, the second body 42, and morespecifically in certain embodiments, the bulb 44 can include an outersurface 46 and an inner surface 48. The inner surface 48 can define anaperture 50 along a longitudinal axis 52. The inner surface 48 iscircumferentially closed relative to the longitudinal axis 52.Therefore, the outer surface 46 faces away from the longitudinal axis 52and the inner surface 48 faces toward the longitudinal axis 52. Aportion of the outer surface 46 can engage the portion of the door 10when in the engaged position.

Continuing with FIGS. 3-6 and 11-14, the seal 32 can include a pluralityof legs 54 disposed between the first and second bodies 40, 42.Therefore, the legs 54 space the first and second bodies 40, 42 apart.The legs 54 can be any suitable configuration and/or orientation, andFIGS. 12 and 14 illustrate different examples. The legs 54 can assist inincreasing stiffness of the seal 32, and/or providing an easier way tomanufacture the seal 32.

Referring to FIGS. 3-6, 11 and 13, each of the legs 54 can include atleast one hinge 56 which assists in allowing movement of the legs 54relative to the first body 40. As the legs 54 move, the second body 42also moves (compare FIGS. 3 and 4 or compare FIGS. 5 and 6). Each of thelegs 54 can include a first end 58 and a second end 60 spaced from eachother. The hinge 56 can be disposed at one of the first and second ends58, 60 of each of the legs 54. Therefore, the hinge 56 is eitherdisposed between the first end 58 and the first body 40, or disposedbetween the second end 60 and the second body 42.

In certain embodiments, the at least one hinge 56 is further defined asa plurality of hinges 56. A respective one of the hinges 56 is connectedto the first and second ends 58, 60 of the legs 54 such that respectivehinges 56 connect the first end 58 of respective legs 54 to the firstbody 40 and other respective hinges 56 connect the second end 60 ofrespective legs 54 to the second body 42. Simply stated, each of thelegs 54 can include two hinges 56, i.e., one hinge 56 at the first end58 and another hinge 56 at the second end 60. As such, some of thehinges 56 are disposed between the first end 58 of the legs 54 and thefirst body 40, and other hinges 56 are disposed between the second end60 of the legs 54 and the second body 42.

In certain embodiments, the hinge 56 can define a groove 62 around eachof the legs 54. In other embodiments, the hinges 56 can define thegroove 62 around each of the first and second ends 58, 60 of each of thelegs 54. The grooves 62 assist in allowing movement of the legs 54. Thegroove 62 can be any suitable configuration and/or location, and it isto be appreciated that the groove 62 can partially or completelysurround the legs 54.

Directional references herein are utilized to assist in describing thefigures, but it is to be appreciated that depending on the location ofthe seal 32 relative to the door 10, and which way the seal 32 isdesigned to move, the directional references can be different. FIGS. 3and 4 illustrate when the second body 42 moves in the direction of arrow64, the legs 54 lean in the same direction of the arrow 64 such that thehinge 56 provides counter-clockwise movement at the first end 58, andthe hinge 56 at the second end 60 provides clockwise movement at thesecond end 60. When moving the second body 42 in the opposite directionof arrow 64, i.e., in the direction of arrow 66, the legs 54 move backtoward upright such that the hinge 56 provides clockwise movement at thefirst end 58, and the hinge 56 at the second end 60 providescounter-clockwise movement at the second end 60. Therefore, in thisorientation, the direction that the seal 32 shears away from the door 10can be in the same direction as arrow 64. The seal 32 can move towardand away from the door 10 any suitable distance, and as one non-limitingexample, the legs 54 can move about forty-six degrees in the directionthat the seal 32 shears away from the door 10.

As mentioned above, the legs 54 can be any suitable configuration andlocation. For example, as shown in FIG. 14, the legs 54 cansubstantially align with each other and be spaced from each other in arow that is substantially parallel to the longitudinal axis 52. The rowof the legs 54 can be centered relative to the second body 42 or thebulb 44, or can be offset relative to the center of the second body 42or bulb 44.

Furthermore, as shown in FIG. 14, each of the legs 54 can be elongatedin a direction transverse to the longitudinal axis 52. In other words,the legs 54 can be elongated perpendicular to the arrow 64/arrow 66. Incertain embodiments, the legs 54 define a thickness and a width, withthe width being greater than the thickness. The legs 54 being elongatedallows movement of the legs 54 and the second body 42 back and forthrelative to the arrow 64/arrow 66, but minimizes the ability of the legs54 to move in a direction perpendicular to the arrow 64/arrow 66.

As shown in FIG. 12, the legs 54 can be a different configuration fromFIG. 14. In FIG. 12, the legs 54 are split into a first row of legs 54and a second row of legs 54 that are spaced side-by-side each other. Thefirst row of legs 54 substantially align with each other and are spacedfrom each other substantially parallel to the longitudinal axis 52. Thesecond row of legs 54 substantially align with each other and are spacedfrom each other substantially parallel to the longitudinal axis 52. Inthis configuration, all of the legs 54 can be supported by the firstbody 40, or the first body 40 can be split into two separate bodies 40,with the first row of legs 54 supported by one of the first bodies 40and the second row of legs 54 supported by the other one of the firstbodies 40.

Generally, the legs 54 of FIG. 12 are narrower than the legs 54 of FIG.14, the narrower legs 54 allows the legs 54 and the second body 42 tomove back and forth relative to the arrow 64/arrow 66 and also move backand forth perpendicular to arrow 64/arrow 66. As such, if the seal 32along the top edge 24 of the support structure 16 is in a differentorientation than the seal 32 along the first and second side edges 26,28 of the support structure 16, the legs 54 and accordingly, the secondbody 42 can move in different directions.

In certain embodiments, the second body 42 of the seal 32 can define ahole 68 (see FIG. 12) spaced from the aperture 50. Furthermore, the seal32 can include an insert 70 disposed in the hole 68 (see FIGS. 11 and14). The insert 70 is more rigid than the second body 42 and/or the legs54 so that when the insert 70 is pulled, the second body 42 and the legs54 move. As such, movement of the insert 70 distributes motion to theseal 32. In certain embodiments, the insert 70 extends along the entirelength of the seal 32 relative to the longitudinal axis 52. By havingthe insert 70 being the entire length of the seal 32, when the insert 70is pulled a generally even distribution of motion is distributed to theentire length of the seal 32. It is to be appreciated that the insert 70can be in other locations than illustrated.

The insert 70 can be any suitable configuration and formed of anysuitable material. Generally, the insert 70 is a rod, a cable or a wirewhich is strong enough to move the second body 42 and the legs 54.Non-limiting examples of the configuration of the insert 70 can includea generally circular cross-sectional configuration (see FIGS. 11 and14), a generally rectangular cross-sectional configuration (see FIGS.7-10), a generally I-shaped cross-sectional configuration, a generallyU-shaped cross-sectional configuration, a generally squarecross-sectional configuration, etc. Any of the embodiments discussedherein can optionally utilize the insert 70. The insert 70 can be formedof metal, rigid plastic(s), or any other suitable material which isstiffer than the material that the seal 32 is formed of. In certainembodiments, the seal 32 is molded around the insert 70 or co-extrudedwith the insert 70. When eliminating the insert 70, the seal 32 can bemolded without the insert 70. It is to be appreciated that the seal 32can be formed by any suitable way, and non-limiting examples can includeone or more of molding, extruding, stamping, injection molding, cutting,etc.

Briefly, the other configurations of the bulb 44 in FIGS. 7, 8 and 10are discussed below. As shown in FIG. 7, the bulb 44 can include atleast one rib 72 disposed in the aperture 50 to split the aperture 50into a first aperture segment 74 and a second aperture segment 76, withthe first and second aperture segments 74, 76 circumferentially closed.In yet other embodiments, the rib 72 is further defined as a pluralityof ribs 72 (FIG. 8) disposed in the aperture 50 and spaced from eachother to split the aperture 50 into the first aperture segment 74, thesecond aperture segment 76 and a third aperture segment 78, with thefirst, second and third aperture segments 74, 76, 78 circumferentiallyclosed. Furthermore, optionally, the bulb 44 of these embodiments caninclude the insert 70 disposed in the rib 72 to support the bulb 44, ifthere are a plurality of ribs 72, one insert 70 can be disposed in eachof the ribs 72. Again, the insert 70 can be disposed along the entirelength to provide a generally even distribution of motion to the entirelength of the seal 32. Regarding FIG. 10, the bulb 44 includes aplurality of ribs 72 and respective inserts 70 disposed in each of theribs 72, with the top having a circumferentially closed aperture 50similar to the configuration of FIG. 11.

In certain embodiments, as shown in FIG. 9, the second body 42 caninclude a center support 80, a first finger 82 and a second finger 84.The first and second fingers 82, 84 extend from the center support 80and wrap around to define a first aperture segment 86 and a secondaperture segment 88 which are circumferentially open to allow the firstand second fingers 82, 84 to move back and forth relative to the centersupport 80. The insert 70 can be disposed in the center support 80, asshown in FIG. 9. The second body 42 can include one or more lip(s),finger(s) and/or flange(s), etc., that do not create a circumferentiallyclosed aperture(s).

Any of these bulb 44 configurations and the second body 42configurations can be utilized with the legs 54 of FIGS. 5, 12 and 14.Furthermore, FIGS. 7-10 illustrate a cross-sectional view of thedifferent bulbs 44 and a cross-sectional view of one configuration ofthe fingers 82, 84 as well as phantom lines of the bulbs 44/the fingers82, 84 to generally show the changes in the bulbs 44/the fingers 82, 84between the engaged and disengaged positions. Movement of the bulbs44/the fingers 82, 84 in FIGS. 7-10 is into and out of the page, so theinsert 70 of the bulbs 44/the fingers 82, 84 in FIGS. 7-10 appear toincrease in size, but that is an illusion due to the bulb 44/the fingers82, 84 moving into and out of the page.

In yet another embodiment, as shown in FIGS. 5 and 6, the second body 42can include an engagement surface 90 that engages the portion of theflexible body 12 when in the engaged position. The engagement surface 90can define a generally flat configuration. Alternatively, any of thebulbs 44, the fingers 82, 84, the lips, the flanges, etc., discussedherein can be added to the second body 42 of this embodiment (FIGS. 5and 6). In addition, this seal 32 can optionally include the insert 70.

The legs 54 of this embodiment include one or more projection(s) 92 (seeFIGS. 5 and 6) which limit the amount of movement of the seal 32, i.e.,the projections 92 act as stops. In certain embodiments, the projections92 are disposed at the ends 58, 60 of the legs 54. For example,respective hinges 56 can be disposed between the projection 92 of eachof the legs 54 and the first body 40, and/or other respective hinges 56can be disposed between the projection 92 of each of the legs 54 and thesecond body 42. In certain embodiments, each of the legs 54 include aplurality of projections 92, and thus, one of the projections 92 can bedisposed at the first end 58 and another one of the projections 92 canbe disposed at the second end 60. Generally, the projections 92 of eachof the legs 54 are spaced from the first and second bodies 40, 42 whenthe seal 32 is in the disengaged position (see FIG. 5), and theprojections 92 of each of the legs 54 engage respective first and secondbodies 40, 42 when the seal 32 is in the engaged position (see FIG. 6).When the projections 92 engage respective first and second bodies 40,42, the seal 32 is prevented from continuing to move in a particulardirection, and in FIG. 6, the direction is identified with arrow 94.

Additional configurations of the seal 32 are shown in FIGS. 15-16. FIG.15 illustrates the first and second bodies 40, 42 separated by the hinge56, with the legs 54 eliminated. FIG. 16 illustrates a plurality of legs54 connected together to define a central through-hole 96 between thelegs 54, such that the legs 54 define a generally diamondcross-sectional configuration. For FIG. 16, the legs 54 move closer toeach other which shrinks the central through-hole 96 and the legs 54move away from each other to enlarge the central through-hole 96 as theseal 32 moves between the engaged and disengaged positions. FIG. 17illustrates a scissor type of seal 32 in which the legs 54 pivotrelative to a plurality of pivot points 98 which moves the second body42 back and forth relative to the support structure 16. The embodimentof FIG. 17 will be discussed further below. Again, any of the bulbs 44,the fingers 82, 84, the lips, the flanges, etc., discussed herein can beadded to these embodiments. Optionally, any of the bulbs 44, the fingers82, 84, the lips, the flanges, etc., discussed herein can include one ormore recesses and/or one or more protrusions to provide more compliancein certain areas of the bulb 44, the fingers 82, 84, the lips, theflanges, etc. It is to be appreciated that the movement of the seal 32is exaggerated in the figures for illustrative purposes only.

As mentioned above, the seal 32 can be movable between the engaged anddisengaged positions. For example, the seal 32 can be movable by anactuator 100, i.e., actively (see FIGS. 1, 18, 19 and 24-26) or bymovement of the door 10, i.e., passively (see FIG. 27). Optionally, whenthe seal 32 is to return to one of the engaged and disengaged positionsonce the SMA actuator 100 is off, the seal 32 can be configured tonaturally bias back to one of the engaged and disengaged positions.Furthermore, one or more actuators 100 can be utilized, and FIG. 1illustrates non-limiting examples of the general location that differentactuators 100 can be mounted relative to the support structure 16. Theactuator 100 can be a motor and/or a solenoid device, a shape memoryalloy (SMA) actuator 100, etc. The actuator(s) 100 can be housed withinthe housing 14 for the door 10, or can be a separate unit that can beattached to the housing 14 and/or attached to the support structure 16.

For example, the SMA actuator 100 can be operatively coupled to the seal32 to move the seal 32 to at least one of the engaged and disengagedpositions. The SMA actuator 100 can have many different configurations,and non-limiting examples are illustrated in FIGS. 20-22. For theembodiments that utilize the insert 70, the SMA actuator 100 can becoupled to the insert 70 to move the seal 32 to at least one of theengaged and disengaged positions, as best shown in FIG. 23. If utilizingmore than one insert 70, the SMA actuator 100 can be coupled to one ofthe inserts 70, more than one of the inserts 70 or all of the inserts70.

When utilizing only one SMA actuator 100, the seals 32 along the firstand second side edges 26, 28 can both move due to an arrangement asshown in FIG. 18. The SMA actuator 100 includes a pair of pulleys 102,with one of the pulleys 102 disposed adjacent to each of the cornersbetween the top edge 24 and the first and second side edges 26, 28. TheSMA actuator 100 can include a cable 104 that is attached to the seal32. FIG. 18 illustrates the seal 32 schematically and any of theconfigurations of the seal 32 are represented by this schematicillustration. When the SMA actuator 100 is actuated, the cable 104 pullson the seal 32 which causes the second body 42 to move from the engagedposition to the disengaged position. If the seal 32 is designed to be inthe disengaged position when the SMA actuator 100 is off, then when theSMA actuator 100 is actuated, the cable 104 pulls the seal 32 from thedisengaged position to the engaged position. The actuator 100 labeled100A in FIG. 1 can represent the general location for the actuator 100of FIG. 18.

When utilizing a plurality of SMA actuators 100, one of the actuators100 can move the one of the seals 32 and another one of the actuators100 can move another one of the seals 32. The SMA actuators 100 can eachinclude the cable 104 that is attached to the seal 32. FIG. 19 canrepresent both of the SMA actuators 100 and the seal 32 is schematicallyshown such that any of the configurations of the seal 32 are representedby this schematic illustration. The actuators 100 labeled 100B in FIG. 1can represent the general location for the pair of actuators 100 of FIG.19. When the SMA actuators 100 are actuated, the cable 104 pulls on therespective seals 32 which cause the second body 42 of each of the seals32 to move from the engaged position to the disengaged position. If theseals 32 are designed to be in the disengaged position when the SMAactuators 100 are off, then when the SMA actuators 100 are actuated, thecable 104 pulls the seals 32 from the disengaged position to the engagedposition.

All of the SMA actuators 100 described herein can include one or moreSMA wire(s) 106. The SMA actuator 100 is selectively activated byelectric current supplied by a power source 108 at a selected voltage.The SMA wire 106 undergoes joule heating when electrically activated,causing the SMA wire 106 to contract in a predetermined direction. Thesealing assembly can include a switch 110 that opens and closes toregulate power flow to the SMA wire 106. Furthermore, the SMA actuator100 can optionally include a return spring 112.

Turning to FIG. 20, the SMA actuator 100 can include a lever 114 that isrotatable about a pivot axis 116 between a first position and a secondposition. The SMA wire 106 is fixed to the lever 114 and fixed to astationary member, which can include the support structure 16 and/or ahousing of the SMA actuator 100. One or more cables 104 are attached torespective ends of the lever 114, and the cables 104 are attached torespective seals 32. Therefore, movement of the lever 114 between thefirst and second positions causes the cables 104 to move, whichcorrespondingly causes the seals 32 to move between the engaged anddisengaged positions. Optionally, the return spring 112 is attached tothe lever 114 to return the lever 114 back to its original position,such as the first position. The return spring 112 and the SMA wire 106are attached to the lever 114 away from the pivot axis 116. FIG. 20 haseliminated the pulleys 102 for illustrative purposes only, but it is tobe appreciated that the cables 104 would extend over respective pulleys102 when utilizing one actuator 100. When the SMA wire 106 is heated,the SMA wire 106 contracts which pulls the lever 114 to rotate the lever114 about the pivot axis 116, which causes the cables 104 to pullrespective seals 32 which causes the seals 32 to move to either theengaged position or the disengaged position. For the configuration ofFIG. 20, heating the SMA wire 106 causes the lever 114 to rotateclockwise relative to the pivot axis 116. If only one seal 32 is to bemoved by one SMA actuator 100, then one of the cables 104 can beremoved.

Referring to FIG. 21, a plurality of SMA wires 106 can be utilized, withone SMA wire 106 disposed on one side of the lever 114 and another SMAwire 106 disposed on the other side of the lever 114. This embodimentcan also be utilized to pull two seals 32 or only one seal 32 asdescribed above. In this configuration, one SMA wire 106 is heated at atime, i.e., the SMA wires 106 are not simultaneously heated. When one ofthe SMA wires 106 is heated, the SMA wire 106 contracts which pulls thelever 114 to rotate the lever 114 about the pivot axis 116counter-clockwise, which causes the cables 104 to pull the respectiveseals 32 and causes the seals 32 to move to either the engaged positionor the disengaged position. When the lever 114 reaches over center, thespring 112 pushes or pulls the lever 114 to rotate the lever 114 rest ofthe way. The spring 112 either pushes or pulls depending on the locationof the spring 112 relative to the lever 114. When the other SMA wire 106is heated, the SMA wire 106 contracts which pulls the lever 114 torotate the lever 114 about the pivot axis 116 clockwise, which causesthe cables to pull the respective seals 32 in the opposite direction toone of the engaged or disengaged positions. Again, when the lever 114reaches over center, the spring 112 pushes or pulls the lever 114 torotate the lever 114 rest of the way. Once the spring 112 takes overmoving the lever 114, the power source 108 for the respective SMA wires106 can be turned off so that the SMA wire 106 can cool down whichcauses the respective SMA wires 106 to relax, expand or lengthen.Optionally, one power source 108 can operate both of the SMA wires 106,or alternatively, a plurality of power sources 108 can be utilized, withone of the power sources 108 operating one of the SMA wires 106, andanother one of the power sources 108 operating the other one of the SMAwires 106.

Referring to FIG. 22, the SMA actuator 100 can include a body 118defining a cavity 120, with a plunger 122 partially disposed in thecavity 120. A post 124 extends from the plunger 122 and the SMA wire 106is attached to a bottom 126 of the body 118 inside the cavity 120 andwraps around the post 124. The return spring 112 is disposed in thecavity 120 between the bottom 126 of the body 118 and an end of the post124. One of the cables 104 is attached to the body 118 and one of theseals 32 and another one of the cables 104 is attached to the plunger122. When the SMA wire 106 is heated, the SMA wire 106 contracts whichpulls the post 124 and the bottom 126 of the body 118 toward each otherwhich pulls the cables toward each other, which causes the seals 32 tomove to either the engaged position or the disengaged position. If onlyone seal 32 is to be moved by one SMA actuator 100, then one of thecables 104 can be removed.

For each of the SMA actuators 100 discussed above for FIGS. 20-22, theSMA wire 106 can be heated by applying the power source 108. The powersource 108 regulates the power flow to the SMA wire 106 as discussedabove. Therefore, when the power source 108 is off, the SMA wire 106cools down, and the SMA wire 106 relaxes, expands, lengthens, etc.; andwhen the power source 108 is on, the SMA wire 106 heats up and the SMAwire 106 contracts, shortens, etc. The switch 110 can be in electricalcommunication with the power source 108 to selectively switch the powersource 108 on and off. As one non-limiting example, when it is desiredto open the door 10, the power source 108 can be turned on which heatsthe corresponding SMA wire 106 and causes the seal 32 to pull away fromthe door 10 to the disengaged position, so that when the door 10 movesfrom the closed position to the open position, the seal 32 is spacedapart from the door 10. Continuing with this example, the power source108 can remain on until the door 10 closes again and then the powersource 108 turns off such that the seal 32 returns to the engagedposition.

Also, a controller can be in communication with the power source 108and/or the switch 110 to control the SMA actuator 100. The controllercan include a processor and a memory on which is recorded instructionsfor communicating with the switch 110 and the power source 108, etc. Thecontroller is configured to execute the instructions from the memory,via the processor. The memory can include, tangible, non-transitorycomputer-readable memory, such as read-only memory (ROM) or flashmemory, etc. The controller can also have random access memory (RAM),electrically erasable programmable read only memory (EEPROM), ahigh-speed clock, analog-to-digital (A/D) and/or digital-to-analog (D/A)circuitry, and any required input/output circuitry and associateddevices, as well as any required signal conditioning and/or signalbuffering circuitry. Therefore, the controller can include all software,hardware, memory, algorithms, connections, sensors, etc., necessary tocommunication with the power source 108 and/or the switch 110, etc.

Referring to FIGS. 24-26, the door 10 can include an extension 128.Furthermore, a latch 130 is movable between a locked position engagingthe extension 128 and corresponding to the seal 32 being in the engagedposition, and an unlocked position disengaging from the extension 128and corresponding to the seal 32 being in the disengaged position.Movement of the door 10 from the closed position to the open positioncauses the seal 32 to move from the engaged position to the disengagedposition. FIG. 24 is a schematic of the door 10 in the closed positionand the seal 32 in the engaged position. As the door 10 moves toward theopen position, the latch 130 engages the extension 128, and thisengagement rotates the latch 130 about a pivot axis 116. As the latch130 rotates, a member 132 that extends from the latch 130 and isattached to the seal 32/cable 104, pushes the seal 32 to the disengagedposition (see FIG. 25). FIG. 26 illustrates the latch 130 in theunlocked position and the seal 32 fully in the disengaged position, andfrom this position, once the door 10 returns to the closed position(which is also shown in FIG. 26), then the SMA actuator 100 can beutilized to return the seal 32 to the engaged position and the latch 130to the locked position. As such, the SMA actuator 100 can be coupled tothe latch 130 to move the latch 130 to at least one of the locked andunlocked positions. The SMA wire 106 can be heated which causes the SMAwire 106 to contract and rotate the latch 130 back into engagement withthe extension 128 (back to the locked position) which resets the latch130 for the next time the door 10 is opened.

Alternatively, or in addition to the discussion for FIGS. 24-26, thelocation of the SMA wire 106 can be moved such that heating the SMA wire106 causes the latch 130 to rotate to the unlocked position and move theseal 32 to the disengaged position when the door 10 begins moving to theopen position; and in this embodiment, the SMA actuator 100 can includethe return spring 112 to return the seal 32 to the engaged position, andthe latch 130 back to the locked position and into engagement with theextension 128 when the door 10 is in the closed position. The actuators100 labeled 100C in FIG. 1 can represent the general location for theactuator 100 of FIGS. 24-26; therefore one or more actuators 100 can beutilized for the embodiment of FIGS. 24-26.

With regard to FIG. 27, the SMA actuator 100 can be eliminated and thelatch 130 can be configured slightly differently from the latch 130 ofFIGS. 24-26. In this embodiment, when the door 10 moves toward the openposition, the latch 130 rotates and the seal 32 moves to the disengagedposition, and when the door 10 moves to the closed position, the latch130 rotates in the opposite direction and the seal 32 moves to theengaged position. The latch 130 includes a first arm 134 and a secondarm 136 having different lengths. In certain embodiments, the second arm136 is longer than the first arm 134, and the second arm 136 is disposedcloser to the floor 20 than the first arm 134. As such, when the door 10is closing, the extension 128 bypasses the first arm 134 and engages thesecond arm 136 to rotate the latch 130 back to the locked position. Asthe latch 130 rotates, the member 132 that extends from the latch 130and is attached to the seal 32/cable 104, pushes the seal 32 to thedisengaged position.

FIGS. 17-27 illustrate the seal 32 schematically and any of theconfigurations of the seal 32 are represented by these schematicillustrations. It is to be appreciated that the seal 32 can beconfigured as a block, similar to the schematic illustrations of FIGS.17-27, if desired.

The SMA actuator 100 includes a smart material, which can be a shapememory alloy (SMA) material which is configured to be activated, i.e. tobe in a first state, in response to the material having at least thefirst temperature such that activation of the SMA material activates theactuator 100. The SMA material is configured to be deactivated, i.e., tobe in a second state, in response to the material having a sufficientnumber of degrees less than the first temperature such that the SMAmaterial deactivates the actuator 100. More specifically, the SMAmaterial exhibits a temperature hysteresis in its phase transformations.The magnitude of the hysteresis is typically between five degrees andforty degrees Celsius (C). The specific magnitude of the hysteresis in aparticular application is a function of several parameters, includingthe material formulation of the SMA material and the stress state of theSMA material.

Shape memory alloys can exhibit a shape memory effect. That is, the SMAwire 106 can undergo a solid state, crystallographic phase change via ashift between a martensite phase, i.e., “martensite”, and an austenitephase, i.e., “austenite.” The martensite phase is a relatively soft andeasily deformable phase of the shape memory alloys, which generallyexists at lower temperatures. The austenite phase, the stronger phase ofshape memory alloys, occurs at higher temperatures. The temperature atwhich a shape memory alloy remembers its high temperature form, referredto as the phase transformation temperature, can be adjusted by applyingstress and other methods. Accordingly, a temperature difference betweenthe austenite phase and the martensite phase can be the phasetransformation delta T. Alternatively stated, the SMA wire 106 canundergo a displacive transformation rather than a diffusionaltransformation to shift between martensite and austenite. A displacivetransformation is a structural change that occurs by the coordinatedmovement of atoms (or groups of atoms) relative to their neighbors. Ingeneral, the martensite phase refers to the comparativelylower-temperature phase and is often more deformable—i.e., Young'smodulus is approximately 2.5 times lower—than the comparativelyhigher-temperature austenite phase.

The temperature at which the SMA wire 106 begins to change from theaustenite phase to the martensite phase is known as the martensite starttemperature, M_(s). The temperature at which the SMA wire 106 completesthe change from the austenite phase to the martensite phase is known asthe martensite finish temperature, M_(f). Similarly, as the SMA wire 106is heated, the temperature at which the SMA wire 106 begins to changefrom the martensite phase to the austenite phase is known as theaustenite start temperature, A_(s). The temperature at which the SMAwire 106 completes the change from the martensite phase to the austenitephase is known as the austenite finish temperature, A_(f).

Therefore, the SMA wire 106 can be in a cold state, i.e., when atemperature of the SMA member 132 is below the martensite finishtemperature M_(f) of the SMA wire 106. Simply stated, the SMA wire 106can be cooled. Furthermore, the SMA wire 106 can also be in a hot state,i.e., when the temperature of the SMA wire 106 is above the austenitefinish temperature A_(f) of the SMA wire 106. Simply stated, the SMAwire 106 can be heated.

In operation, SMA material that is pre-strained or subjected to tensilestress can change dimension upon changing crystallographic phase tothereby convert thermal energy to mechanical energy. That is, the SMAmaterial can change crystallographic phase from martensite to austeniteand thereby dimensionally contract if pseudoplastically pre-strained soas to convert thermal energy to mechanical energy. Conversely, the SMAmaterial can change crystallographic phase from austenite to martensiteand if under stress thereby dimensionally expand.

“Pseudoplastically pre-strained” refers to stretching the SMA materialwhile in the martensite phase so that the strain exhibited by the SMAmaterial under that loading condition is not fully recovered whenunloaded, where purely elastic strain would be fully recovered. In thecase of SMA material, it is possible to load the material such that theelastic strain limit is surpassed and deformation takes place in themartensitic crystal structure of the material prior to exceeding thetrue plastic strain limit of the SMA material. Strain of this type,between those two limits, is pseudoplastic strain, called such becauseupon unloading it appears to have plastically deformed, but when heatedto the point that the SMA material transforms to its austenite phase,that strain can be recovered, returning the SMA material to the originallength observed prior to being subjected to any applied loading.

The SMA material can have any suitable composition. In particular, theSMA material can include an element selected from the group includingcobalt, nickel, titanium, indium, manganese, iron, palladium, zinc,copper, silver, gold, cadmium, tin, silicon, platinum, gallium, andcombinations thereof. For example, suitable SMA materials can includenickel-titanium based alloys, nickel-aluminum based alloys,nickel-gallium based alloys, indium-titanium based alloys,indium-cadmium based alloys, nickel-cobalt-aluminum based alloys,nickel-manganese-gallium based alloys, copper based alloys (e.g.,copper-zinc alloys, copper-aluminum alloys, copper-gold alloys, andcopper-tin alloys), gold-cadmium based alloys, silver-cadmium basedalloys, manganese-copper based alloys, iron-platinum based alloys,iron-palladium based alloys, and combinations thereof. The SMA materialcan be binary, ternary, or any higher order so long as the SMA materialexhibits a shape memory effect, e.g., a change in shape orientation,damping capacity, and the like.

Returning to the embodiment of FIG. 17, the scissor type of seal 32utilizes the SMA wire 106 to create the scissor movement. Therefore,heating the SMA wire 106 can cause the seal 32 to move to one of theengaged and disengaged positions. Furthermore, when cooling the SMA wire106, the seal 32 moves to the other position. The SMA wires 106 can befixed at the pivot points 98 (at least at the two extremities), wrappedup and around an outer pivot, and then down and around the followingpivot on the opposite side (two mirrored wires—solid and dotted—aredepicted in FIG. 17. As the SMA wire 106 transforms, the wire exerts amoment about the outer pivots which causes the mechanism to extend adistance, as the angle of the various links grows. Because of thekinematics of the linkage, the generated force, increases as the linksbecome oriented more in-line with the output force, while theincremental stroke decreases. The geometry of the scissor mechanismdictates its performance, with the link length roughly controlling thedisplacement capability, the radius of the pivots setting the forcecapabilities, and the initial link angle, dictating the degree ofleveraging.

The scissor design allows for units to be combined in parallel andseries to provide a greater degree of actuator tailorability as well asthe flexibility for providing point actuation (as shown in FIG. 17) orspatial actuation, where the surface formed by numerous scissor unitswould expand in one dimension while contracting in the other. SMA wires106 can also be attached to the mechanism in various configurations inseries and parallel, both mechanically and electrically, to aid indesigning the actuator 100 for ease of assembly or for specific powerrequirements. The mechanism can also be implemented in an antagonisticconfiguration, with separate SMA wire 106 groups providing an expansivemotion, and others providing a contractile operation. The SMA wires 106do not slide around and over the pivots during actuation if themechanism is symmetric, the arc circumscribed by the wire simplychanges, which can assist in extending the life of the seal 32.

In addition to the above, a manufacturing process of the insert 70 isdisclosed in FIGS. 28-30. The insert 70, which can be formed of metal,can be stamped into the general flat configuration of FIG. 28. Referringto FIG. 29, the insert 70 can include a first wing 138 which is foldedrelative to a central body 140. After the first wing 138 is folded, theinsert 70 can include a second wing 142 which is folded relative to thecentral body 140 in the same direction as the first wing 138 such thatthe first and second wings 138, 142 are substantially parallel to eachother. Then one of the bulbs 44, the fingers 82, 84, the lips, theflanges, etc., can be affixed to the central body 140 of the insert 70.The SMA actuator 100 can be coupled to the insert 70 by the central body140, the first wing 138 and/or the second wing 142. The SMA actuator 100causes the seal 32 to lean. It is to be appreciated depending on thelength of the seal 32, the pattern illustrated in FIG. 28 can berepeated as many times as desired to achieve the desired length. Thismanufacturing process provides a quick and easy way to shape the insert70. Once the insert 70 is in the desired configuration, the rubbermaterial of the seal 32 can be formed over the insert 70.

One or more of the legs 54 discussed above can include the insert 70.The insert 70 disposed in the legs 54 can be any of the configurationsdiscussed above, i.e., rectangular, circular, etc. For example, theinsert 70 of FIGS. 28-30 can be folded such that part of the first andsecond wings 138, 142 create part of the first body 40, the spaced apartcolumns create part of the legs 54 and the central body 140 creates partof the second body 42. Even though not illustrated in FIGS. 28-30, thecolumns can define one or more indentation(s) complementary to thegrooves 62 of the hinges 56 to assist in allowing movement of the legs54 in the desired direction(s).

While the best modes and other embodiments for carrying out thedisclosure have been described in detail, those familiar with the art towhich this disclosure relates will recognize various alternative designsand embodiments for practicing the disclosure within the scope of theappended claims. Furthermore, the embodiments shown in the drawings orthe characteristics of various embodiments mentioned in the presentdescription are not necessarily to be understood as embodimentsindependent of each other. Rather, it is possible that each of thecharacteristics described in one of the examples of an embodiment can becombined with one or a plurality of other desired characteristics fromother embodiments, resulting in other embodiments not described in wordsor by reference to the drawings. Accordingly, such other embodimentsfall within the framework of the scope of the appended claims.

1. A sealing assembly comprising: a door including a flexible body thatis movable between an open position and a closed position; and a sealmovable between an engaged position in which the seal is positioned inengagement with a portion of the flexible body when the flexible body isin the closed position and a disengaged position in which the seal movesaway from the portion of the flexible body as the flexible body movesfrom the closed position to the open position such that the flexiblebody is spaced from the seal to minimize frictional engagement with theseal.
 2. The assembly as set forth in claim 1 wherein the seal includesa first body fixed to a support structure and a second body spaced fromthe first body, with the second body engaging the portion of theflexible body when in the engaged position.
 3. The assembly as set forthin claim 2 wherein the second body includes a bulb that engages theportion of the flexible body when in the engaged position.
 4. Theassembly as set forth in claim 3 wherein the bulb includes an outersurface and an inner surface, with the inner surface defining anaperture along a longitudinal axis, and the inner surface iscircumferentially closed relative to the longitudinal axis.
 5. Theassembly as set forth in claim 4 wherein the seal includes a pluralityof legs disposed between the first and second bodies, and wherein eachof the legs includes at least one hinge which assists in allowingmovement of the legs relative to the first body.
 6. The assembly as setforth in claim 5 wherein the hinge defines a groove around each of thelegs.
 7. The assembly as set forth in claim 5 wherein the at least onehinge is further defined as a plurality of hinges, with each of the legsincluding a first end and a second end spaced from each other, and arespective one of the hinges connected to the first and second ends ofthe legs such that respective hinges connects the first end ofrespective legs to the first body and other respective hinges connectsthe second end of respective legs to the second body.
 8. The assembly asset forth in claim 7 wherein the hinges define a groove around each ofthe first and second ends of each of the legs.
 9. The assembly as setforth in claim 7 wherein the legs substantially align with each otherand are spaced from each other in a row that is substantially parallelto the longitudinal axis.
 10. The assembly as set forth in claim 7wherein the legs are split into a first row of legs and a second row oflegs that are spaced side-by-side each other, with the first row of legssubstantially aligning with each other and spaced from each othersubstantially parallel to the longitudinal axis, and with the second rowof legs substantially aligning with each other and spaced from eachother substantially parallel to the longitudinal axis.
 11. The assemblyas set forth in claim 4 wherein the second body of the seal defines ahole spaced from the aperture, and wherein the seal includes an insertdisposed in the hole, and further including a shape memory alloyactuator coupled to the insert to move the seal to at least one of theengaged and disengaged positions.
 12. The assembly as set forth in claim4 wherein the bulb includes at least one rib disposed in the aperture tosplit the aperture into a first aperture segment and a second aperturesegment.
 13. The assembly as set forth in claim 12 wherein the sealincludes an insert disposed in the rib, and further including a shapememory alloy actuator coupled to the insert to move the seal to at leastone of the engaged and disengaged positions.
 14. The assembly as setforth in claim 12 wherein the rib is further defined as a plurality ofribs disposed in the aperture and spaced from each other to split theaperture into the first aperture segment, the second aperture segmentand a third aperture segment.
 15. The assembly as set forth in claim 12wherein the bulb includes an insert disposed in the rib to support thebulb.
 16. The assembly as set forth in claim 2 wherein the second bodyincludes a center support, a first finger and a second finger, with thefirst and second fingers extending from the center support and wrappingaround to define a first aperture segment and a second aperture segmentwhich are circumferentially open to allow the first and second fingersto move back and forth.
 17. The assembly as set forth in claim 2 whereinthe second body includes an engagement surface that engages the portionof the flexible body when in the engaged position, and wherein theengagement surface defines a generally flat configuration.
 18. Theassembly as set forth in claim 1 further including a shape memory alloyactuator operatively coupled to the seal to move the seal to at leastone of the engaged and disengaged positions.
 19. The assembly as setforth in claim 1: wherein the door is movably attached to a supportstructure that defines an opening, with the door covering the openingwhen in the closed position and at least partially uncovering theopening when in the open position; wherein the door includes anextension; further including a latch movable between a locked positionengaging the extension and corresponding to the seal being in theengaged position, and an unlocked position disengaging from theextension and corresponding to the seal being in the disengagedposition; and further including a shape memory alloy actuator coupled tothe latch to move the latch to at least one of the locked and unlockedpositions.
 20. A sealing assembly comprising: a support structuredefining an opening; a door including a flexible body that is movablebetween an open position and a closed position, with the door coveringthe opening when in the closed position and at least partiallyuncovering the opening when in the open position; and a seal including afirst body fixed to the support structure and a second body spaced fromthe first body, with at least the second body movable between an engagedposition in which the second body is positioned in engagement with aportion of the flexible body when the flexible body is in the closedposition and a disengaged position in which the second body moves awayfrom the portion of the flexible body as the flexible body moves fromthe closed position to the open position such that the flexible body isspaced from the seal to minimize frictional engagement with the seal.